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🛠️ Tool: HackAgent - Open-Source Red-Team Toolkit for AI Agent Security
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HackAgent is an open-source red-team toolkit designed to test AI agents against adversarial attacks including prompt injection, jailbreaking, and goal hijacking. It provides a structured framework for evaluating whether agent guardrails hold under adversarial conditions.
Key Features
The toolkit supports multiple agent frameworks: Google ADK, OpenAI SDK, and LiteLLM. It sends adversarial goals through each framework's native protocol rather than wrapping attacks in a generic HTTP layer. This means attacks reach the agent the same way legitimate inputs do.
The attack workflow:
1. Install via pip install hackagent
2. Configure target agent (name, endpoint, agent type)
3. Define attack parameters (type, goals, generator, judge)
4. Run and review the risk report
Technical Implementation
HackAgent uses an LLM-based judge to evaluate guardrail bypass success. The judge configuration is flexible. In the example, gpt-4o-mini serves as both the adversarial prompt generator and the HarmBench-type judge. Attack types include advprefix (adversarial prefix injection) and pair (paired attack strategy).
Dashboard and Reporting
The web dashboard at app.hackagent.dev tracks:
• Attack Runs: campaigns across registered agents with status and results
• Agents: registered AI agents with endpoints and framework types
• Security Reports: per-agent vulnerability analysis with risk scores
Sample results show meaningful variance:
• prod-adk-agent + advprefix: 21/50 jailbreaks (42% risk)
• prod-adk-agent + pair: 38/50 jailbreaks (76% risk, critical)
• gpt-4o-assistant + pair: 12/50 jailbreaks (24% risk)
Aggregate: 150 total tests, 71 vulnerabilities, 58% average risk score.
Limitations
Result reliability depends on the LLM judge quality. Using the same model as both generator and judge may introduce evaluation bias. The current attack types cover a subset of known adversarial techniques. More sophisticated approaches like multi-turn manipulation or context poisoning are not demonstrated. Haven't tested personally.
🔹 HackAgent #AISecurity #RedTeaming #PromptInjection #tool
🔗 Source: https://hackagent.dev/